Backlight module and luminous keyboard

Abstract

The invention discloses a backlight module and a luminous keyboard. The luminous keyboard comprises a plurality of keys and a backlight module arranged below the keys, and one of the keys is a key with different colors. The backlight module comprises a light guide plate, at least one multi-color light source group, a light attenuation structure and a second optical medium. The light guide plate is composed of a first optical medium; the multi-color light source group is provided with a plurality of multi-color light sources, and the first light source is closest to the different-color key; the refractive index of the second optical medium is smaller than that of the first optical medium. The multi-color light source group is arranged corresponding to the incident surface of the light guide plate. The second optical medium is arranged between the multi-color light source group and the light incident surface. The light attenuation structure is arranged between the first light source and the different-color key and attenuates the first color light of the first light source passing through or passing through the light attenuation structure. The light-emitting keyboard can effectively solve the problem that the light-emitting color of the keys deviates to the color of the light of the light source closest to the keys, and therefore the key light-emitting effect and the use impression of the light-emitting keyboard are greatly improved.

Description

technical field [0001] The invention relates to a backlight module and a luminous keyboard thereof, in particular to a backlight module and a luminous keyboard thereof which use a light attenuation structure to improve the color shift problem of key luminescence. Background technique [0002] Generally speaking, in order to make the keyboard have the function of lighting the keys, the current common design is to directly configure the backlight module with light-emitting diodes under the multiple keys of the keyboard. The key caps of each key can be used to produce a key luminous effect. [0003] In the prior art, the color luminous effect on the keyboard is to adopt the mixed light design of multiple sets of multicolor light source groups (such as red, green and blue light-emitting diodes (RGB LED)) to make the identification symbols on the periphery of the keycap or the keycap The luminous color meets the requirements. Multiple groups of multi-color light source groups a...

AI Technical Summary

Problems solved by technology

For example, when the whole keyboard needs to uniformly emit white light, if the red light source of the multi-color light source group is the closest to the different-color keys, the white light presented on the different-color keys is prone to reddish light mixing deviation, which will affect the vision of the luminous keyboard. effect and cause quality doubts

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